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  2. Intercom - Wikipedia

    en.wikipedia.org/wiki/Intercom

    Amplified: Intercom systems that utilize a single speaker to transmit and receive communications. Amplifier: An intercom system's main or central component, responsible for switching or connecting communication paths between master and substations. In addition, amplifiers distribute or switch power to auxiliary connected devices, such as door ...

  3. Boundary microphone - Wikipedia

    en.wikipedia.org/wiki/Boundary_microphone

    When concealing the mic is important, such as with film production, a smaller housing may be desirable. Sanken's CUB-01 boundary microphone has a 32 mm diameter and 12 mm height, which makes it easier to hide in TV and film field shooting and easier to reposition or temporarily mount in locations (e.g. taping it onto the inside ceiling of a car).

  4. Public address system - Wikipedia

    en.wikipedia.org/wiki/Public_address_system

    In many cases, front of house speakers are elevated, either by mounting them on poles or by "flying" them from anchors in the ceiling. The Front of House speakers are elevated to prevent the sound from being absorbed by the first few rows of audience members. The subwoofers do not need to be elevated, because deep bass is omnidirectional.

  5. Enhance Your Listening Experience With These Expert Rated ...

    www.aol.com/lifestyle/best-ceiling-speakers...

    Best Overall Ceiling Speakers: Focal Littora 1000 ICW10. Best Affordable Whole-Home Option: Klipsch CDT-5800-C-II. Best Low-Cost, Full-Range Ceiling Speakers: Definitive Technology Ueua/Di 6.5R.

  6. Sound reinforcement system - Wikipedia

    en.wikipedia.org/wiki/Sound_reinforcement_system

    From this perspective, speaker cabinets need to have easy-to-access horns, speakers, and crossover circuitry, so that repairs or replacements can be made. Many touring acts and large venue corporate events will rent large sound reinforcement systems that typically include one or more audio engineers on staff with the renting company.

  7. What 'secret' loudspeaker codes mean at department stores - AOL

    www.aol.com/news/2010-10-13-what-secret...

    If you've been shopping in a big box retail store you've probably heard an announcement on the loudspeaker such as, "code yellow toys, code yellow toys." This "code" is one of many innocuous ...